commit ebe5dcf0d9adcf784f1b6685e050cd18a6ce177c
author Tibor Dusnoki <tdusnoki@inf.u-szeged.hu> Tue Oct 15 13:21:14 2019 +0200
committer Alexis Hétu <sugoi@google.com> Wed Oct 16 16:01:03 2019 +0000
tree fe285509f182e98ec040de0761d1344fd16bf964
parent 520ed2286b88a25233fdf7389f95a2dd0a8f7b6a

Define getHostCPUFeatures for Windows on ARM64 platform

This change implements getHostCPUFeatures function to enable this functionality on Windows on ARM64.
This was committed to llvm at https://reviews.llvm.org/D68139 .

Bug: chromium:893460
Change-Id: I7ae62f298683979a4ab1aa8099d6e91706b15c9b
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/37328
Presubmit-Ready: Alexis Hétu <sugoi@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>

third_party/llvm-7.0/llvm/lib/Support/Host.cpp

diff --git a/third_party/llvm-7.0/llvm/lib/Support/Host.cpp b/third_party/llvm-7.0/llvm/lib/Support/Host.cpp
index 2c718dd..c15b212 100644
--- a/third_party/llvm-7.0/llvm/lib/Support/Host.cpp
+++ b/third_party/llvm-7.0/llvm/lib/Support/Host.cpp
@@ -1358,6 +1358,17 @@
 
   return true;
 }
+#elif defined(_WIN32) && (defined(__aarch64__) || defined(_M_ARM64))
+bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
+  if (IsProcessorFeaturePresent(PF_ARM_NEON_INSTRUCTIONS_AVAILABLE))
+    Features["neon"] = true;
+  if (IsProcessorFeaturePresent(PF_ARM_V8_CRC32_INSTRUCTIONS_AVAILABLE))
+    Features["crc"] = true;
+  if (IsProcessorFeaturePresent(PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE))
+    Features["crypto"] = true;
+
+  return true;
+}
 #else
 bool sys::getHostCPUFeatures(StringMap<bool> &Features) { return false; }
 #endif